Pivoted outer jaw pipe wrench



Dec. 28, 1948. c. H. GREEN 29 PIVOTED OUTER-JAWIPIPE WRENCH I Fild Nov. 6, 1945 WM ,6 m

. .I I I Q x- J/vw-W 79E (0 05 HARLEM 6355 ATTORNEY Patented Dec. 28, 1948 UNITED STATES PATENT OFFICE PIVOTED OUTER JAW PIPE WRENCH Clyde H. Green, Macedonia, Ohio Application November 6, 1945, Serial No. 627,001

1 Claim. 1

The present invention relates to a pivoted outer jaw pipe wrench and the primary object thereof is to eliminate the pivot pin commonly employed in pipe wrenches \efih a fixed jaw and a pivoted jaw.

Another object of the invention is to provide a pipe Wrench of simpler and more compactconstruction than that of prior devices.

With the foregoing and other objects and advantages in view, the invention consists of the novel construction and arrangement of parts hereinafter described and claimed.

In the accompanying drawings illustrating the invention:

Figure 1 is a side elevation of the invention.

Figure 2 is a rear elevation thereof.

Figure 3 is a detail perspective View of the pivotal jaw.

Figure 4 is a detail, fragmentary perspective of the fixed jaw.

Like numerals in the description and drawing designate the same parts of construction. I is the fixed jaw member of the wrench having an elongated wrench handle 2 and 3 is the pivotal jaw member. Both jaws are provided with serrations or teeth 4 arranged in conventional manner transversely.

The jaw of member I is formed in the rear of the teeth with a transverse curvilinear groove 5 with the upper rear thereof terminating in a shoulder 6. Shoulder 6 projects above the plane of the teeth 4. The bottom of the groove is slight- 1y arched or bowed upwardly from its ends to the middle thereof as at l. A threaded bolt hole 9 passes horizontally through the back of the jaw and is positioned to intersect the bottom of groove 5 at approximately the middle.

The pivotal jaw member 3 is formed on the rear with a downwardly and rearwardly projecting, transverse lug ill of cylindrical form. This lug i is provided on its underside with an arc'uate slot H which is coaxial with the round portion of lug Ill. The lug is adapted to slide endwise into groove in which position the arcuate slot II is contiguous to the bottom thereof and in alignment with the horizontal bolt hole 9. When so positioned a bolt l2, threaded on its end, is passed through the fixed jaw member I 2 and threaded into the end of bolt hole 9. round shank of the bolt projects into the groove 5 and arcuate slot ll, thus permitting pivotal movement of jaw member 3 but preventing axial movement of lug ill in the groove. Moreover, the enlarged outer ends of the groove which are provided by the inwardly-bowed middle l thereof permit a slight lateral rocking of the jaw 3 to compensate for slight irregularities in the article gripped by the jaws.

It will be noted that the two said wrench members can be readily assembled and taken apart by the use of bolt l2. Furthermore, the use of a destructible pivot pin for the joint is obviated. Instead, when a bolt [2 becomes worn from use and the joint becomes loose and insecure, it is a simple matter to replace the worn bolt.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

A pipe Wrench, comprising a fixed jaw formed with a transverse groove, said groove being formed in an axial direction with an inwardlybowed center portion, a pivotal jaw provided with a transverse cylindrical projection constructed to rotatably engage in said groove and to be rockably supported on said inwardly-bowed center portion thereof, said cylindrical projection being formed with an arcuate slot concentrically thereof, a removable bolt passing transversely through the fixed jaw from the back thereof and intersecting said groove in the region of said center portion, and said bolt being provided with a shank adapted to be slidably seated in said arcuate slot of said cylindrical projection.

CLYDE H. GREEN.

7 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 378,362 Goodrich Feb. 21, 1888 520,689 Krebs May 29, 1894 551,311 Gay et al. Dec. 10, 1895 705,054 Enderton July 22, 1902 2,057,899 Lucas Oct. 20, 1936 The 

